TY  - RPRT
TI  - Calibration of beta-particle-emitting ophthalmic applicators 
AU  - Pruitt, John S
PY  - 1987
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 250-9
DO  - 10.6028/NBS.SP.250-9
ER  -